After you used software in 90 days, you need change the pass code, then you can use it again.

Porsche Piwis II Functions and Descriptions:

1. Read/clear error code, catch data stream, computer programming match, component test, maintenance information consult, components site drawing, wiring diagram.2. Porsche Piwis II works with the old and latest Porsche cars. It is equipped with the Lenovo or Dell laptop and original software for the test.Porsche Piwis II can help you diagnose and program all new and old kind of Porsche cars. For example: 911(997)(991)，Boxster/Cayman, (987),Cayenne up to MY 2010, Cayenne from MY 2011 and Panamera.3. New Panamera can only be diagnosed by using Porsche Piwis II.4. Able to work with both old and new Porsche cars up to MY 2013.